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The Sarah Jane Adventures Season 4 Episode 3

Androvax the Veil returns to Earth and asks for the gangs help, but how can they trust him? Or is the threat posed by the Vault of Secrets great enough to overcome old enmities. And when the android guardians threaten destruction, is there really any other choice?

Episode Title: The Vault of Secrets (1)

Air Date: 2010-10-18